How to test the air tightness of aluminum motor housing?

The manufacture of aluminum motor shell is a very important part of motor production, and the materials of aluminum motor shell generally include cast iron, cast aluminum alloy, steel pipe, steel plate, etc., and the main purpose is to protect the motor from rain, rust and other environments.

In a humid environment, the ordinary motor casing material is easy to corrode and rust, the waterproof performance of the motor depends on the protection of the casing, after the motor is eroded by water, it will lead to unstable use or scrapped motor, so the waterproof shell of the motor is very important.